Rubies are essentially alumina (Al2O3) with a contaminant of chromium in the form of Cr2O3. A lab-made ruby weighing 1.994g is ground, digested in hot nitric acid, and the chromium prcipitated as Cr(OH)3(s). If the mass of the Cr(OH)3 is 0.0135 g, compute the percentage of chromium in the ruby. Also compute the percentage of Cr2O3 in the ruby.

Q: How many grams of Fe are there in 5.00 moles of Fe4[Fe(CN)6]3?

A: Given,  5 moles of Fe4[Fe(CN)6]

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A: Given: Mass of Cu = 0.3685 g Mass of compound = 1.8686 g

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A: Balanced chemical equation for the reaction is given below.

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Q: This equation models how pure silver (Ag) is extracted from ores of AgK(CN)2 (potassium…

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Q: Enter your answer in the provided box. Transition metals, located in the center of the periodic…

A: Element- Sodium  Atomic weight - 22.98976928 Number of atoms of Na - 4 Element- Ruthenium Atomic…

Q: If you added an excess of CaCl 2 ⋅ 2 H 2 O to 1.504 g Na 3 PO 4, how many grams of Ca 3 ( PO 4 ) 2…

A: Given:Mass of Na3PO4 = 1.50 g.Molar mass of Na3PO4 = 163.94 g/mol.Molar mass of Ca3(PO4)2 = 310.18…

Q: Cu + AgNO3 → Cu(NO3)2 + Ag, balanced or not balanced?

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Q: balance the following equation  (NH4)2 SO4(aq)+     Ba(C2H3O2)2(aq)   ->   BaSO4(s) + NH4C2H3O2(aq)

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Q: For an industrial wastewater that contains 1.0×10-4 M total CrVI at pH 8, a very common approach to…

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A: The reaction above can be correctly written as below: 4Ca5(PO4)3 F + 18SiO2 + 30C -----&gt;  3 P4 +…

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Q: en stat jv) a hydride which in water gives a dibasic acid

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Q: Iodine is made by the following reaction 2 NaIO3(aq) + 5 NaHSO3(aq) → 3 NaHSO4 (aq) + 2 Na2SO4 (aq)…

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Q: impurity, for example, when 2 g is dissolved in water and oxidized, then precipitated Fe (OH)3 is…

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Q: A student is given a 1.3002 g of an unknown copper compound. Following isolation by displacement by…

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Q: Starting with the following equation, Fe₃O₄(s) + CO(g) → Fe(l) + CO₂(g) calculate the mass in grams…

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Q: What is the total number of oxygen atoms on the right-hand side of this chemical equation? 2 Caz…

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Q: How many grams of chromium(II) fluoride contain 3.80 grams of Cr2+?

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Q: mass

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Q: a) Please calculate the theoretical lead mass can be obtained from 10 t lead concentrate containing…

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Q: Calculate the weight percent of Cr in an alloy that contains 60 g of chromium, 55 g of nickel and…

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Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".